Joint for concrete structures.



A. E; POULSTON.

JOINT FOR CONCRETE CTURES.

.APPLICATION FILED N 191 1,279,431 Patented Sept. '17, 1918.

, w Q 5, v M) JlZPaaZaZam v v l O dttoz oration;

" v UNITED STATES ARTHUR E. roULs'roiv, or RAVENNA, onro.

aom'r non CONCRETE s'rrwo'rnnns.

To all whom it may concern:

Be it known'that LARTHUR E. PoULs'roN, a citizen of the United States,residin at Ravenna, in the county of Portage and State of Ohi I Jointfor Concrete Structures, of which the following is a specification;

This invention relates to joints for concrete structures such as roads,sea walls, retaining walls,,-fire walls, etc., where the concrete is.exposed to climatic changes and is necessarily formed in sections,therebyto allow for expansion and contraction. Owing to the relativemovement of separate con- I crete sections andany metal housed in andconnecting the same, it has not ordinarily been practical to connectseparate concrete SBCtlOIiS w1th metal, concrete 1s exposed to severeclimatic changes.

For example, in many-localities, concrete pansion sleeve being providedin connection with these metal members to permit said members to expandand contract independently of the concrete while, at the same time,holding the engaged sections of concrete in proper relation to eachother under various climatic conditions.

A still further object is to provide an expansion sleeve of simple andinexpensive construction which can be. applied readily to the metal rodsand embedded therewith Within the concrete at the time of the formationof the concrete sections, these expansion sleeves being out of directcontact with the rods, thus to allow for the free expansion andcontraction of the rods.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafter de-Specification of Letters Patent.

have invented a new and useful particularly where the stitute eflicientsupports.

material,

suflicient to keep the concrete Patented Sept. 1'7, .1918.

Application filed November 24, 1917; Serial No. 203,818.

scribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what isclaimed, without departing from the spirit of theinvention.

In the accompanying drawings the present invention has been shownapplied to a road construction and the preferred form of the inventionhas been shown.

In said drawings Figure 1 is a plan view of a sectionof a road formed ofconcrete and showing,

in dottedlines, some of the positions in which the expansion sleeves'androds can be placed within the ends of the sections ofthe road.

Fig; 2 said section being on an enlarged scale.

Fig. 3 is a section on line 3-3 of Fig. 1. Fig. 4 is an elevation of anexpansion sleeve. a

. Fi 5 is a longitudinal section through the s eeve and showing the rodtherein.

Referring to the figures by characters of crete road, the ends of thesection being preferably obliquely disposed as indicated, thus to permitthe weight-of a load to be gradually transferred from one section to theother at the joint. The ends of the sections can, if desired, be mountedon inverted T- rails as indicated at 2 in Fig. 3, which con- The meansemployed for holding the sections of concrete flush under variousclimatic conditions includes a metal rod 3 which can be of any desiredlength and of any desired cross-sectional contour. This rod is providedwith a sleeve 4 formed of thin material and which is slightly longerthan the rod, the ends of the sleeve being closed by caps 5 which can bemade of any desired.

so that spaces are thus left between the caps and the ends of the rod 3to allow for expansion of the rod within the sleeve 4. The sleeve 4 canbe made of any material desired. Under ordinary conditions it ispreferred to make these-sleeves by wrapping the rods with waxed paper,the caps 5 being pressed out of waxed paper adapted to maintain their;shape while the sleeves are being embedded within the concrete ashereinafter pointed out. The sleeves can also be made of wood shavingswrapped about a is a section on line 2 2 of Fig. 1,

80 reference 1. designates a section of a 0011- are molded as ordinarilybut within the ends "maintained at ll times with their faces flush andone cannot'be caused-to rise'or fall as a result of climatic changes,Without a corresponding movement of the other. The rods rod or theycan'be made of fabric-which can be creosoted, ofglass, celluloid, metalor rubber. In fact the casingcan be of any material suflicient tocompletely surround the rod and prevent it from coming intocontact withthe concrete in which the, sleeve or casing is embedded.

V In constructing; for example, a concrete road havlng the presentimprovements combined therewith, the sections of the road ofthe'sections are embedded the rods 3 with their'sleeves' 4 and caps 5arranged thereon. These rods will extend into the ends of two adjoiningsections and will bridge the space between the'sections, as shownparticularly in Fig. 3. The'sleeves with the rods therein are preferablyarranged with their uppermost portions approximately along a lineextending transversely of the concrete road.

at the center thereof. The caps 5 will keep the concrete away from theends of the rod thus leaving-spaces into which the rod can expand whensubjected'to heat. The sleeve 4 will keep the concrete away from therod' rod will not be interfered with.

By arranging a series of these sleeves and rods at the ends ofthey-sections as shown, for example, in -.Fig. 1, the"said sections willbe so that the expansion and contraction of the crete is not permitted.

As the sleeve can be made of paper, the cost of incorporating theimprovement in a concrete structure will not beobjectionable and willmore than offset the cost of repairs and reconstruction which isconstantly necessary in order to keep the ordinary concrete structure ingoodcondition. What is claimed is t v The combination with a concretestructure made up of separate sections, of a rod extending into themeeting portions of the two sections, an expansion sleeve extendingaround the rod forholding the rodout of contact with the concrete, saidsleeve extending beyond the endsof the rod, the ends of the sleeve beingclosed and spaced from the rod. i

In testimony that I claim the foregoing as my own, I have hereto aflixedsignature in the presence of two witnesses.

I ARTHUR E. POULSTQN.

V Witnesses:

IVY E] SIMPSON," t I .PHILOMENA A. ROCKELLI.

